Damper on Nema for corexy ?
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any reason you want to use dampers?
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IMHO Dampers are a bad idea on an axis that has a toothed pulley on the motor they can cause the axis of that motor to tilt under the tension of the belts!
Doug
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I have a corexy and dual Z stepper, and have damper on all of them, even on extruder.
And I have no issues from that.
The loudest thing on my printer is the stock part-cooling fan
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[adding to an old thread]
I struggled with movement noise for some time and the problem disappeared when I added dampers to the X/Y steppers of my HEVO. My printer now sounds great. Apparently the noise was caused by motor vibrations that were transmitted to the 3030 frame and at time caused it to resonate.
To verify that X/Y dampers will help your CoreXY, disconnect the belts, and try to reproduce the noise with gcode like the one below (adjust the speed range as needed):
G91 ; relative ; Move motor at different speeds. ; Use X for motor 1, Y for motor 2 ; These moves do not require homing. G1 X300 H2 F2400 G1 X300 H2 F2600 G1 X300 H2 F2800 G1 X300 H2 F3000 G1 X300 H2 F3200 ; ...Once you are able to reproduced the noise, remove the motor from the frame, hold it in suspended in your hand and run the script again. If the noise disappeared, your printer will benefit from dampers. I my case I had to change the design of the motors mounts to compensate for the additional 6mm of clearance the dampers add.
https://www.amazon.com/gp/product/B07GWN6V89
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Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!
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@whosrdaddy said in Damper on Nema for corexy ?:
Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!
Just wondering, would any thermal insulation provided by the dampener transfer less heat to printed parts and as such have a positive effect on deflection in that regard? Maybe insignificant?
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@bearer said in Damper on Nema for corexy ?:
@whosrdaddy said in Damper on Nema for corexy ?:
Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!
Just wondering, would any thermal insulation provided by the dampener transfer less heat to printed parts and as such have a positive effect on deflection in that regard? Maybe insignificant?
Very simple, use metal parts to mount your motor
I use these from Motedis, here is their informative Video.
There is also a newer version which allows for corner mounting. -
@whosrdaddy said in Damper on Nema for corexy ?:
Very simple, use metal parts to mount your motor
Hehe, thats the plan. But I was just curious if the dampener thing was all back and white with printed parts.
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@whosrdaddy said in Damper on Nema for corexy ?:
Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!
I didn't observe any of that on my printer. The dampers I use are very stiff and I could tighten the belts to my liking. I was actually surprised how stiff they are, must be a material that absorbs high frequencies but not static force.
I got these no names ones from amazon
https://www.amazon.com/gp/product/B07GWN6V89 but Moon has here some information on their dampers https://www.moonsindustries.com/series/dampers-a020202My printer is definitely a better printer now. YMMV.
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@whosrdaddy said in Damper on Nema for corexy ?:
Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!
They're quite a bit stiffer than you'd think. Considering a lot of us are using printed parts....
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@Phaedrux said in Damper on Nema for corexy ?:
@whosrdaddy said in Damper on Nema for corexy ?:
Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!
They're quite a bit stiffer than you'd think. Considering a lot of us are using printed parts....
Yeah I wouldn't expect those kinds of dampers would be any less rigid than printed ones!
